Re: Grub2 documentation of the GRUB_CMDLINE_*XEN* parameters -- unclear. What's _intended_?

[PGNet Dev]

On 11/22/2015 11:54 AM, Colin Watson wrote:
> No, they aren't exclusive of one another, but are used to construct
> different command lines.  GRUB_CMDLINE_XEN* are used for the hypervisor
> command line; GRUB_CMDLINE_LINUX_XEN_REPLACE* are used for the Linux
> kernel command line (but if unset, the corresponding GRUB_CMDLINE_LINUX*
> values are used instead).
>
> The misleading description you quote was the one in 2.00, but was
> clarified in git a while ago:
>
>    
> http://git.savannah.gnu.org/cgit/grub.git/commit/?id=48f39bb4df5b903aaa66db9fdc6679571bff0dd9

That's exactly the helpful clarification needed. Thanks!  It'd be useful 
to have that updated on the grub2 website's docs -- it's just as valid 
there.

> > And, what specifically gets mapped to Xen kernel's "options=" parameter
> > line?
> >
> > E.g., a grub2-mkconfig-generated xen*.cfg takes the form

> Upstream grub-mkconfig does not generate xen*.cfg at all.  This is an
> openSUSE-specific patch.  From inspecting their source code, I believe
> that the GRUB_CMDLINE_XEN* options will apply here.

I'd realized that there's different naming, e.g. the "grub2-mkconfig", 
but had not realized this^^ diff as well.

> > The docs should clearly address which PARAMETERS map to the "options=" line,
> > and which to the kernel=" line in the Xen case.
>
> No doubt, but it is up to the openSUSE maintainers to make sure that

Noted.  The latest upgrade of the distro has proven to be quite 
problematic, particularly in the real-world/modern { pv-kernel + Xen + 
Grub2 + EFI } use case; and the docs are a bit of a mess.   I'd 
_strongly_ prefer a grub2 instance closer to upstream's.  Not yet sure 
what replacing the distro's with a 'clean' upstream build entails ...

Thanks again for the response.